Preliminary Report on Corn Variety "Zhengdan 958" Planting Density

An experiment on different planting densities of corn variety Zhengdan 958 was carried out.The results showed that a highest yield was achieved when the planting density was at 90,000 plants/hm2,meanwhile the plant height,ear position,ear length,ear diameter,the grain number per spike,hundred grain weight and stress resistance were all relatively suitable and the potentiality of yield increasing was high.The yields would decrease when the planting densities were lower or higher than that density.When the planting densities were lower,the ear of corn was larger and single ear grain weight was higher but the number of ear was lesser and the yield could not reach the highest.When the planting densities were higher,the ear became smaller,bald tip was relatively longer,empty straw increased,stress resistance decreased and single ear grain weight decreased and the yield could not reach the highest.